Vitamin B6: Pyridoxal Phosphate

The video discusses pyridoxal phosphate, a cofactor essential for vitamin B6 metabolism. It explains how pyridoxal phosphate is transformed from pyridoxine and its critical role in enzyme functions, particularly in transaminases. The video also covers the chemical properties of pyridoxal phosphate, its involvement in various biochemical reactions, and its importance in nitrogen metabolism. The video concludes with a preview of future content on the mechanism of pyridoxal phosphate-dependent transamination.

What is the dietary form of pyridoxal phosphate that we consume?

• Pyridoxamine

• Pyridoxine

• Pyridoxal

• Pyridoxal phosphate

Which type of enzyme primarily uses pyridoxal phosphate in amino acid metabolism?

• Isomerase

• Ligase

• Transaminase

• Dehydrogenase

What type of linkage is formed between pyridoxal phosphate and lysine in enzymes?

• Peptide linkage

• Glycosidic linkage

• Ester linkage

• Schiff base linkage

Which reaction is NOT catalyzed by pyridoxal phosphate?

• Hydrolysis

• Beta elimination

• Racemization

• Decarboxylation

What is the only D-amino acid useful in humans, as mentioned in the video?

• D-Alanine

• D-Serine

• D-Glutamate

• D-Lysine